Kits
Rear Anti-Roll Bar Installation Hardware Kit
This Rear Anti-Roll Bar Installation
(Hardware) Kit for the Porsche 914 includes every essential
component required to correctly mount, secure and reinforce the rear anti-roll
(sway) bar system. Designed for restoration, upgrades and repairs, this kit
ensures the rear suspension performs as Porsche intended—improving stability,
cornering control and chassis response
Fits:
- Porsche 914 (1970-1974)
Diagram Ref No: 28
The kit includes:
2 x
91450125910/1 – Mounting Bracket
2 x
91450153271/1 – Reinforcement Plates
2 x
90133379303/1 – Bushings
2 x
90133375301/1 Brackets
4 x
90134378200/1 – Bushings
4 x
90007508704 – Bolts
4 x
90002701501 – Washers
Each component is manufactured to precision tolerances and performance-fit standards—ideal for replacing aged hardware, upgrading worn pieces or installing a rear anti-roll bar on models that did not originally have one fitted.
What the Rear Anti-Roll Bar Hardware Kit Does
The anti-roll bar system works to stabilise the rear of the Porsche 914 by reducing body roll during cornering. This kit ensures the correct mounting and reinforcement of the bar, allowing it to function effectively.
Key Functions
- Provides secure mounting points for the sway bar
- Reinforces the rear suspension console area
- Maintains proper bar geometry and alignment
- Reduces rear-end body roll under lateral load
- Improves cornering balance, stability and driver confidence
- Ensures correct bushing and bracket fitment for long-term reliability
A properly mounted rear anti-roll bar transforms the handling of a Porsche 914—especially when combined with refreshed suspension components.
The Porsche 914’s rear suspension is known for stress on mounting hardware, especially on cars used for performance driving, autocross or spirited road use. Decades of use take a toll on original parts.
Common Failure Causes
- Aged
bushings that crack, harden or collapse
- Corrosion
on brackets, bolts and washers
- Metal
fatigue from continuous lateral forces
- Previous
incorrect installations leading to weakened mounting points
- Reinforcement
plates separating due to age or rust
- Chassis flex stressing original mounting areas
Once hardware wears or fails, the sway bar becomes ineffective—or worse, may detach entirely.
Why This Kit Should Be Replaced or Installed
Installing a fresh anti-roll bar hardware kit restores the Porsche 914’s rear-end stability and prevents further suspension damage.
Benefits of Installing This New Kit
- Ensures correct mounting and geometry of the sway bar
- Improves handling, cornering and overall stability
- Eliminates creaking, clunking or loose-suspension symptoms
- Reinforces structural areas prone to fatigue
- Provides a fresh set of all required brackets, bolts and bushings
- Ideal for restoration or upgrading non-equipped cars
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91450125910
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Anti-Roll Bars (ARB’s) play an important role in a vehicle’s suspension system, helping to reduce body roll by transferring cornering load from one side of a vehicle to the other.
Often mounted to the vehicle’s chassis with rubber bushes, these bushes ensure the bar works as intended. To prevent the anti-roll bar from moving laterally within its mounts when turning, OE manufacturers will either bond the bushes to the bar, add dead-stops to the bar itself, or rely solely on the clamping pressure of the rubber.
But what happens when those bushes wear and need to be replaced? Often anti-roll bars with bonded bushes come as a costly complete assembly, so the alternative is to fit a more cost-effective unbonded polyurethane replacement, like the many we offer.
In most cases, friction from the bush will prevent any side-to-side bar movement. Still, when turning aggressively or cornering at higher speeds, a laterally shifting anti-roll bar decreases the efficiency and effectiveness of the bar, changing the dynamics of your suspension system in unpredictable ways. It also poses the risk of the bar fouling on other areas of the vehicle or suspension system.
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